Input for vector to scalar volume from jpg not working

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Operating system: Windows 10
Slicer version: 4.10.2
Expected behavior:
Actual behavior:

I am sorry if this question was already posted.

I am trying to reconstruct a 3D model from an MRI series of jpg images, I am following the tutorial for the import of png images, so first after importing I set the image spacing and origin in the “volumes” module. Then when I try to input the vector volume in the “vector to scalar conveter” module, I cannot select the previously imported volume.

Am I doing something wrong?

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Maybe it is already a single-component (grayscale) volume. Can you check what value do you see in Volumes module / Volume information / Number of scalars? If you see 1 there then “Volume type” should be “Scalar” and you don’t need “Vector to scalar converter”. If you see 3 or 4 then you should see that “Volume type” is “Vector” and so the volume shows up in need “Vector to scalar converter” module’s input selector.

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Hi Andras, thank you for your reply, it was indeed already a greyscale volume!

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